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Thread: Linear then Rotary Action

  1. #1
    Associate Engineer
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    Linear then Rotary Action

    Hello! I'm fairly early in my ME studies so I apologize if this is a simple question.

    I saw an interesting wine cellar online that had a top door that utilized first a linear action to drop the hatch down then a rotary action. From what I can tell, the entire outer ring rotates and moves up/down. How is this achieved? Could there be gearing on the outside of this ring with a rotary actuator and then another linear actuator that moves the platform or is there a type of actuator that can achieve both these steps? Also, would there need to be more than one linear actuator to even out the load? Any insight into how this door functions would be greatly appreciated! Thank you!

  2. #2
    Administrator Kelly Bramble's Avatar
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    Ring gear on the window frame and electric motor with gear to rotate it.
    Tell me and I forget. Teach me and I remember. Involve me and I learn.

  3. #3
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    That makes sense and is what I figured. But it's more about combine the two actions that I'm wondering about. Would the whole window frame along with the motor raise up and down via one (or more) linear actuators? How does the rotating base stay secure on whatever platform is being raised/lowered? I know there's not much information to go off of based on the video. Just wasn't sure if someone could direct me to some site/book that talked about combine motions and movement?

  4. #4
    Technical Fellow jboggs's Avatar
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    Can you post a link to the video? Your description can be interpreted different ways.

    Also, the gold standard on the topic is:
    Mechanisms, Linkages, and Mechanical Controls by Nicholas Chironis
    https://www.*********om/Mechanisms-L.../dp/0070107750

    Enjoy it!

  5. #5
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    Quote Originally Posted by jboggs View Post
    Can you post a link to the video? Your description can be interpreted different ways.

    Also, the gold standard on the topic is:
    Mechanisms, Linkages, and Mechanical Controls by Nicholas Chironis
    https://www.*********om/Mechanisms-L.../dp/0070107750

    Enjoy it!
    The link was asterisked out. But I was able to find it by searching the title. Thank you for that!

    My original link I put in the first post seems to have disappeared. I'll post it again but in case it gets messed up again you can find it by searching for "spiral cellar". They have a hatch version and a retractable/rotating door version. I'm talking about the latter. Thanks!

    https://www.youtube.com/watch?v=VjCZbZ09iK4

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